Lever and roller split charging device and method for main fuel pump regulator of aero-engine

Abstract

The invention discloses a lever and roller split charging device and method for an aero-engine main fuel pump regulator, and relates to the field of aero-engine part repairing. The device comprises a bottom plate, a fence protruding upwards is constructed on the outer edge of the bottom plate, and a mounting station and a disassembling station are constructed on the fence; a positioning mechanism is constructed in the decomposition station, the positioning mechanism comprises a positioning device arranged on the bottom plate and a base plate rotationally arranged on the top face of the fence, a vertically-penetrating arc-shaped channel is constructed at one end of the base plate, the end, provided with the arc-shaped channel, of the base plate is used for positioning the roller end of the lever, and a pin shaft of a roller is vertically exposed to the position of the arc-shaped channel; the mounting station comprises an auxiliary loading mechanism arranged on the bottom plate, the auxiliary loading mechanism comprises an ejector pin which is vertically arranged and elastically mounted, and the ejector pin is used for extending into a roller shaft hole to be loaded; the problems that when a roller of a comprehensive lever is replaced, no special disassembling tool or assembling tool exists, the disassembling efficiency is low, and the assembling quality is not high are solved.

Description

Technical Field

[0001] The invention relates to the field of aircraft engine parts repair, in particular to a lever roller subassembly device and method for an aircraft engine main fuel pump regulator. Background Art

[0002] The main fuel pump regulator is the core control accessory of the aircraft engine. It is mainly used to reliably control the engine at different flight altitudes, speeds, atmospheric temperatures and pressures to ensure the stable operation of the engine under various conditions. As a highly precise mechanical hydraulic control accessory, the main fuel regulator has a complex internal structure and requires extremely high coordination and cooperation between various components. The integrated lever is used to integrate the speed signal and the air pressure signal to ensure the normal operation of the main fuel pump regulator. One end of the integrated lever is a ball and socket structure, and the other end is a roller structure. After long-term operation, the roller often wears abnormally, affecting the reliability of the main fuel pump regulator. When the roller is worn, it needs to be replaced. Summary of the invention

[0003] The purpose of the present invention is to provide a device and method for subassembling a lever roller of an aircraft engine main fuel pump regulator, so as to solve the problem of low disassembly efficiency and poor assembly quality caused by the lack of special disassembly tooling and assembly tooling when replacing the roller of the integrated lever.

[0004] In order to solve the above problems, the present invention adopts the following technical means: A lever roller assembly device for a main fuel pump regulator of an aircraft engine, comprising a bottom plate, an outer edge of the bottom plate is structured with an upwardly protruding enclosure, and the enclosure structure forms an installation station and a disassembly station; A positioning mechanism is constructed in the decomposition station, and the positioning mechanism includes a positioning device arranged on the bottom plate and a pad rotatably arranged on the top surface of the enclosure, one end of the pad is constructed with a vertically penetrating arc channel, and one end of the pad is constructed with the arc channel for positioning the roller end of the lever, and the pin shaft of the roller is vertically exposed to the position of the arc channel; The installation station comprises an auxiliary loading mechanism arranged on the bottom plate, and the auxiliary loading mechanism comprises a vertically arranged and elastically mounted ejector pin, and the ejector pin is used to extend into the roller shaft hole to be installed.

[0005] Preferably, the pad is clamped between the base plate and the enclosure, and includes a positioning portion with a through hole, an arc plate is installed on the outer edge of the positioning portion, the arc side of the arc plate and the positioning portion form the arc channel, and a tail rod is also installed on the outer edge of the positioning portion and the side wall opposite to the arc plate.

[0006] Furthermore, a clamping screw is rotatably installed at the through hole position of the positioning portion, one end of the clamping screw is threadedly connected to the base plate, and the other end of the clamping screw is rotated to pass through the enclosure and is constructed as a square head structure. The clamping screw is constructed as a square head structure and is detachably connected to a plum blossom knob, and the plum blossom knob is constructed with a square hole matching the square head structure.

[0007] Furthermore, the clamping screw is configured with an annular groove for slidingly embedding into the positioning portion.

[0008] Furthermore, the installation station and the disassembly station are further provided with leveling screws, the bottom end of the leveling screws is threadedly connected to the base plate, and the top end of the leveling screws is constructed as a planar structure.

[0009] Furthermore, the auxiliary loading mechanism includes a mounting base, which is inserted and assembled on the bottom plate, a mounting cavity is constructed in the mounting base, the mounting cavity is set to pass through the top surface of the mounting base, a stop cover is installed on the top surface of the mounting base, a ejector pin is slidably provided in the mounting cavity, one end of the ejector pin slides out of the stop cover, a limiting ring is provided on the part of the ejector pin located in the mounting cavity, a compression spring is provided in the mounting cavity, one end of the compression spring abuts against the limiting ring, and the other end abuts against the bottom surface of the mounting cavity, and the end of the limiting ring opposite to the compression spring abuts against the stop cover.

[0010] In addition, a subassembly method for the aforementioned lever roller for the regulator of the aircraft engine main fuel pump includes a disassembly method and an assembly method; The decomposition method comprises the following steps: S110. The integrated lever is loaded into the decomposition station; S120. Level the integrated lever using the leveling screw; S130. Using a pad to press and position the roller end of the integrated lever, and allowing the roller pin to be vertically exposed in the arc-shaped channel; S140. Use the plum blossom knob to drive the clamping screw to allow the pad to clamp the roller end. After completion, remove the plum blossom knob and move it to the clamping screw of the idle pad; S150. Use a punch to abut one end of the roller pin, use a hammer to impact the punch, remove the roller pin, and complete the separation of the roller and the integrated lever; The assembly method comprises the following steps: S210. The roller to be installed is loaded onto the integrated lever, and then the roller is placed on the top surface of the stop cover of the auxiliary loading mechanism, and the ejector pin is passed through the small shaft hole of the integrated lever and the roller at the same time, and the integrated lever is leveled using the leveling screw; S220. Align the small shaft to be installed with the ejector pin, and hit the small shaft with a hammer so that it is gradually installed into the roller along the ejector pin withdrawal direction until the pin stops at the end surface of the integrated lever; S230. Move the assembled integrated lever to the bottom of the pad, level the integrated lever with the leveling screw, rotate the pad, let the pad hold the roller, and let the pin be exposed in the arc channel, tighten the clamping screw with the plum knob, remove the plum knob, and complete the pad holding and positioning of the roller; S240. Use a punch to impact the area around the mounting hole of the integrated lever roller small shaft, so that the integrated lever base acts as a safety for the small shaft; For the other end of the roller after the pin is installed, turn over the entire integrated lever and repeat S230 to S240 to complete the assembly of the roller.

[0011] During use, the present invention has the following beneficial effects: In order to solve the problem of low disassembly efficiency and poor assembly quality due to the lack of special disassembly and assembly tools when replacing rollers on the integrated lever, a set of special tools integrating disassembly and assembly functions was designed and manufactured based on the analysis of the parts structure. The integrated lever can be precisely fixed during the disassembly and assembly process, which facilitates the rapid and precise disassembly of the small shaft and the concentric positioning of the mounting hole of the integrated lever and the roller during assembly. The application of this invention greatly shortens the disassembly and assembly time, and reduces the replacement time of the integrated lever roller and small shaft from 30 minutes to less than 5 minutes. At the same time, the pad structure designed in this invention can avoid the risk of roller tightness caused by deformation of the integrated lever during impact. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the present invention.

[0013] Figure 2 It is a schematic diagram of the pad structure of the present invention.

[0014] Figure 3 This is a schematic diagram of the compression screw structure of the present invention.

[0015] Figure 4 It is a schematic diagram of the structure of the plum blossom knob of the present invention.

[0016] Figure 5 It is a schematic diagram of the structure of the auxiliary loading mechanism of the present invention.

[0017] Among them, 1-bottom plate, 2-enclosure, 3-pad, 4-arc channel, 5-auxiliary loading mechanism, 6-thimble, 7-positioning part, 8-arc plate, 9-tail rod, 10-clamping screw, 11-plum blossom knob, 12-annular groove, 13-leveling screw, 14-mounting base, 15-mounting cavity, 16-abutment stop cover, 17-limiting ring, 18-compression spring. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features of the embodiments may be combined with each other.

[0021] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0022] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use, or the positions or positional relationships commonly understood by those skilled in the art, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0023] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] Please refer to Figures 1 to 5 As shown, a lever roller assembly device for a main fuel pump regulator of an aircraft engine comprises a base plate 1, an outer edge of the base plate 1 is configured with an upwardly protruding enclosure 2, and the enclosure 2 is configured to form an installation station and a disassembly station; A positioning mechanism is constructed in the decomposition station, and the positioning mechanism includes a positioning device arranged on the bottom plate 1 and a pad 3 rotatably arranged on the top surface of the enclosure 2, one end of the pad 3 is constructed with a vertically penetrating arc channel 4, and one end of the pad 3 is constructed with the arc channel 4 for positioning the roller end of the lever, and the pin shaft of the roller is vertically exposed to the position of the arc channel 4; The installation station includes an auxiliary loading mechanism 5 arranged on the bottom plate 1, and the auxiliary loading mechanism 5 includes a vertically arranged and elastically mounted ejector pin 6, and the ejector pin 6 is used to extend into the roller shaft hole to be installed.

[0025] In this way, in order to solve the problem of low disassembly efficiency and poor assembly quality caused by the lack of special disassembly tooling and assembly tooling when replacing the roller of the integrated lever, a set of special tooling integrating disassembly and assembly functions is designed and manufactured based on the analysis of the parts structure. The precise fixation of the integrated lever during the disassembly and assembly process is achieved, which facilitates the rapid and precise disassembly of the small shaft and the concentric positioning of the mounting hole of the integrated lever and the roller during assembly. Through the application of this invention, the disassembly and assembly time are greatly shortened, and the replacement time of the integrated lever roller and the small shaft is reduced from 30 minutes to less than 5 minutes. At the same time, the pad 3 structure designed in the invention can avoid the risk of roller tightness caused by the deformation of the integrated lever during impact.

[0026] Furthermore, the pad 3 is clamped between the base plate 1 and the enclosure 2, and the pad 3 includes a positioning portion 7 with a through hole, an arc plate 8 is installed on the outer edge of the positioning portion 7, the arc side of the arc plate 8 and the positioning portion 7 form the arc channel 4, and a tail rod 9 is also installed on the outer edge of the positioning portion 7 and the side wall opposite to the arc plate 8.

[0027] In addition, a clamping screw 10 is rotatably installed at the through hole position of the positioning portion 7, one end of the clamping screw 10 is threadedly connected to the base plate 1, and the other end of the clamping screw 10 is rotated to pass through the enclosure 2 and is constructed as a square head structure. The clamping screw 10 is constructed as a square head structure and is detachably connected to a plum blossom knob 11, and the plum blossom knob 11 is constructed with a square hole matching the square head structure.

[0028] Furthermore, the clamping screw 10 is formed with an annular groove 12 for slidingly embedding into the positioning portion 7 .

[0029] At the same time, a leveling screw 13 is also provided in the installation station and the disassembly station. The bottom end of the leveling screw 13 is threadedly connected to the base plate 1, and the top end of the leveling screw 13 is constructed as a planar structure.

[0030] In addition, the auxiliary loading mechanism 5 includes a mounting base 14, which is inserted and assembled on the base plate 1, and a mounting cavity 15 is constructed in the mounting base 14. The mounting cavity 15 is set to pass through the top surface of the mounting base 14, and a contact stop cover 16 is installed on the top surface of the mounting base 14. A push pin 6 is slidably provided in the mounting cavity 15, and one end of the push pin 6 slides out of the contact stop cover 16, and a limiting ring 17 is provided on the part of the push pin 6 located in the mounting cavity 15. A compression spring 18 is provided in the mounting cavity 15, and one end of the compression spring 18 abuts against the limiting ring 17, and the other end abuts against the bottom surface of the mounting cavity 15, and the end of the limiting ring 17 opposite to the compression spring 18 abuts against the abutment stop cover 16.

[0031] Specifically, for the device involved in the present invention, the following methods are adopted for assembly and disassembly: a subassembly method for the lever roller of the regulator of the main fuel pump of the aircraft engine, including a disassembly method and an assembly method; The decomposition method comprises the following steps: S110. The integrated lever is loaded into the decomposition station; S120. Leveling the integrated lever by leveling screw 13; S130. The roller end of the integrated lever is pressed and positioned using the pad 3, and the roller pin is vertically exposed in the arc-shaped channel 4; S140. Use the plum blossom knob 11 to drive the clamping screw 10, so that the pad 3 clamps the roller end, and after completion, remove the plum blossom knob 11 and move it to the free pad 3 on the clamping screw 10; S150. Use a punch to abut one end of the roller pin, use a hammer to impact the punch, remove the roller pin, and complete the separation of the roller and the integrated lever; The assembly method comprises the following steps: S210. The roller to be installed is loaded onto the integrated lever, and then the roller is placed on the top surface of the stop cover 16 of the auxiliary loading mechanism 5, and the ejector pin 6 passes through the small shaft hole of the integrated lever and the roller at the same time, and the integrated lever is leveled using the leveling screw 13; S220. Align the small shaft to be installed with the ejector pin 6, and hit the small shaft with a hammer so that it is gradually installed into the roller along the direction of the ejector pin 6 until the pin stops at the end surface of the integrated lever; S230. Move the assembled integrated lever to the bottom of the pad 3, level the integrated lever by the leveling screw 13, rotate the pad 3, let the pad 3 hold the roller, and let the pin be exposed in the arc channel 4, tighten the clamping screw 10 by the plum blossom knob 11, remove the plum blossom knob 11, and complete the pressing and positioning of the pad 3 on the roller; S240. Use a punch to impact the area around the mounting hole of the integrated lever roller small shaft, so that the integrated lever base acts as a safety for the small shaft; For the other end of the roller after the pin is installed, turn over the entire integrated lever and repeat S230 to S240 to complete the assembly of the roller.

[0032] In this way, in order to solve the problem of low disassembly efficiency and poor assembly quality when replacing rollers on the integrated lever without special disassembly and assembly tools, a set of special tools integrating disassembly and assembly functions was designed and manufactured based on the analysis of the parts structure. The integrated lever can be precisely fixed during disassembly and assembly, which is convenient for the rapid and accurate disassembly of the small shaft and the concentric positioning of the mounting hole of the integrated lever and the roller during assembly.

[0033] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A lever roller assembly device for an aircraft engine main fuel pump regulator, characterized in that: It comprises a base plate (1), the outer edge of the base plate (1) is structured with an upwardly protruding enclosure (2), and the enclosure (2) is structured to form an installation station and a disassembly station; A positioning mechanism is constructed in the decomposition station, the positioning mechanism comprising a pad (3) rotatably arranged on the top surface of the enclosure (2), one end of the pad (3) being constructed with a vertically penetrating arc-shaped channel (4), one end of the pad (3) being constructed with the arc-shaped channel (4) being used for positioning the roller end of the lever, and the pin shaft of the roller is vertically exposed to the position of the arc-shaped channel (4); The installation station comprises an auxiliary loading mechanism (5) arranged on the base plate (1), the auxiliary loading mechanism (5) comprising a vertically arranged and elastically mounted ejector pin (6), the ejector pin (6) being used to extend into a roller shaft hole to be installed.

2. The lever roller assembly device for the main fuel pump regulator of an aircraft engine according to claim 1, characterized in that: The pad (3) is clamped between the bottom plate (1) and the enclosure (2), the pad (3) comprising a positioning portion (7) having a through hole, an arc-shaped plate (8) being mounted on the outer edge of the positioning portion (7), the arc-shaped side of the arc-shaped plate (8) and the positioning portion (7) forming the arc-shaped channel (4), and a tail rod (9) being mounted on the outer edge of the positioning portion (7) and the side wall opposite to the arc-shaped plate (8).

3. The lever roller assembly device for the main fuel pump regulator of an aircraft engine according to claim 2, characterized in that: A clamping screw (10) is rotatably mounted at the through hole position of the positioning portion (7); one end of the clamping screw (10) is threadedly connected to the base plate (1); the other end of the clamping screw (10) is rotatably passed through the enclosure (2) and is constructed as a square head structure; the clamping screw (10) is constructed as a square head structure and is detachably connected to a plum blossom knob (11); the plum blossom knob (11) is constructed with a square hole that matches the square head structure.

4. The lever roller assembly device for the main fuel pump regulator of an aircraft engine according to claim 3, characterized in that: The clamping screw (10) is provided with an annular groove (12) for slidingly embedding into the positioning portion (7).

5. The lever roller assembly device for the main fuel pump regulator of an aircraft engine according to claim 1, characterized in that: A leveling screw (13) is also provided in the installation station and the disassembly station, the bottom end of the leveling screw (13) is threadedly connected to the bottom plate (1), and the top end of the leveling screw (13) is constructed as a planar structure.

6. The lever roller assembly device for the main fuel pump regulator of an aircraft engine according to claim 1, characterized in that: The auxiliary loading mechanism (5) comprises a mounting base (14), the mounting base (14) being inserted and assembled on the bottom plate (1), a mounting cavity (15) being constructed in the mounting base (14), the mounting cavity (15) being arranged to pass through the top surface of the mounting base (14), a contact stop cover (16) being installed on the top surface of the mounting base (14), a slidable ejector pin (6) being arranged in the mounting cavity (15), one end of the ejector pin (6) slidingly extending out of the contact stop cover (16), a portion of the ejector pin (6) located in the mounting cavity (15) being provided with a limiting ring (17), a compression spring (18) being arranged in the mounting cavity (15), one end of the compression spring (18) being in contact with the limiting ring (17), and the other end being in contact with the bottom surface of the mounting cavity (15), and an end of the limiting ring (17) opposite to the compression spring (18) being in contact with the contact stop cover (16).

7. A method for disassembling the lever roller disassembling device for the main fuel pump regulator of an aircraft engine based on any one of claims 1 to 6, characterized in that: Including disassembly method and assembly method; The decomposition method comprises the following steps: S110. The integrated lever is loaded into the decomposition station; S120. The integrated lever is leveled and adjusted by the leveling screw (13); S130. Using the pad (3), the roller end of the integrated lever is pressed and positioned, and the pin of the roller is vertically exposed in the arc-shaped channel (4); S140. Use the plum blossom knob (11) to drive the clamping screw (10) so that the pad (3) clamps the roller end. After completion, remove the plum blossom knob (11) and move it to the clamping screw (10) of the idle pad (3); S150. Use a punch to abut one end of the roller pin, use a hammer to impact the punch, remove the roller pin, and complete the separation of the roller and the integrated lever; The assembly method comprises the following steps: S210. The roller to be installed is mounted on the integrated lever, and then the roller is placed on the top surface of the stop cover (16) of the auxiliary loading mechanism (5), and the ejector pin (6) is passed through the small shaft holes of the integrated lever and the roller at the same time, and the integrated lever is leveled using the leveling screw (13); S220. Align the small shaft to be installed with the ejector pin (6), and strike the small shaft with a hammer so that it is gradually installed into the roller along the direction of the ejector pin (6) until the pin stops at the end surface of the integrated lever; S230. Move the assembled integrated lever to the bottom of the pad (3), level the integrated lever by means of the leveling screw (13), rotate the pad (3), allow the pad (3) to press the roller, and allow the pin to be exposed in the arc-shaped channel (4), tighten the clamping screw (10) by means of the plum blossom knob (11), and then remove the plum blossom knob (11), thereby completing the pressing and positioning of the pad (3) on the roller; S240. Use a punch to impact the area around the mounting hole of the integrated lever roller small shaft, so that the integrated lever base acts as a safety for the small shaft; For the other end of the roller after the pin is installed, turn over the entire integrated lever and repeat S230 to S240 to complete the assembly of the roller.

Images